R50/53 Octane Requirements
Originally Posted by o-ron
Does anybody know what Premium is costing out in the midwest? Also, is it 91 or 93 out there?
Over here in washington it's either 91 or 92...
Over here in washington it's either 91 or 92...
dont know about midwest but Florida from orlando to key west 93 is running 2.89 to 3.05
!!!
eek2:!
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Joined: May 2003
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From: hawaii
well, at least hawaii is sharing in your pain with our infamous "gas cap" law...i just filled up late last week with 91 at $3.47 at our local chevron, and yesterday topped off at tesoro with 91 at $3.30. and this week i believe our gas prices are supposed to jump up again.
and this is only on oahu...the poor folks on the outer islands are likely hitting $3.50+.
and this is only on oahu...the poor folks on the outer islands are likely hitting $3.50+.
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Originally Posted by kbseto
well, at least hawaii is sharing in your pain with our infamous "gas cap" law...i just filled up late last week with 91 at $3.47 at our local chevron, and yesterday topped off at tesoro with 91 at $3.30. and this week i believe our gas prices are supposed to jump up again.
and this is only on oahu...the poor folks on the outer islands are likely hitting $3.50+.
and this is only on oahu...the poor folks on the outer islands are likely hitting $3.50+.
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Joined: Apr 2006
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Did some math here after looking at the difference in gas prices and some typical MCS mpg averages
Regular is running about $2.86 per gallon,,, Premium about .20 higher or $3.06. Looking at mpg averages from 25 to 29, the increase in cost per mile of using premium over regular is less then 1 cent per mile assuming the average mpg is identical between using the different grades of gas. In the big picture, if you drive 20,000 miles per year, at an average mpg of 25, your increase in annual gas costs using premium will be $160. However, if you achieve a gain in mpg using premium over regular, the increase in cost of premium can be reduced or eliminated,,, take a look.
Based on the gas prices shown,
if you average 25 mpg on regular, averaging 26.75 mpg with premium will yield the same cost per mile.
if you average 26 mpg on regular, averaging 27.83 mpg with premium will yield the same cost per mile.
if you average 27 mpg on regular, averaging 28.9 mpg with premium will yield the same cost per mile.
if you average 28 mpg on regular, averaging 29.95 mpg with premium will yield the same cost per mile.
My MCS has not arrived yet, so I cant do a test of average mpg with the two different gas grades to see what increase is realistic when using premium. However, with no change in average mpg having an increase of less then 1 cent mile (actually .8 cents at an average of 25 mpg), any increase in mpg resulting from using premium would only make the real world cost of using premium neglible and it might actually save money if you factor in a cleaner engine not needing as much maintance.
For me, the MCS will be using premium since I am not seeing any real savings from using the cheap stuff after doing the math.
Regular is running about $2.86 per gallon,,, Premium about .20 higher or $3.06. Looking at mpg averages from 25 to 29, the increase in cost per mile of using premium over regular is less then 1 cent per mile assuming the average mpg is identical between using the different grades of gas. In the big picture, if you drive 20,000 miles per year, at an average mpg of 25, your increase in annual gas costs using premium will be $160. However, if you achieve a gain in mpg using premium over regular, the increase in cost of premium can be reduced or eliminated,,, take a look.
Based on the gas prices shown,
if you average 25 mpg on regular, averaging 26.75 mpg with premium will yield the same cost per mile.
if you average 26 mpg on regular, averaging 27.83 mpg with premium will yield the same cost per mile.
if you average 27 mpg on regular, averaging 28.9 mpg with premium will yield the same cost per mile.
if you average 28 mpg on regular, averaging 29.95 mpg with premium will yield the same cost per mile.
My MCS has not arrived yet, so I cant do a test of average mpg with the two different gas grades to see what increase is realistic when using premium. However, with no change in average mpg having an increase of less then 1 cent mile (actually .8 cents at an average of 25 mpg), any increase in mpg resulting from using premium would only make the real world cost of using premium neglible and it might actually save money if you factor in a cleaner engine not needing as much maintance.
For me, the MCS will be using premium since I am not seeing any real savings from using the cheap stuff after doing the math.
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From: Seattle, WA
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One thing that can be said about the MCS,,, it is a performance car that gets respectable mileage. For me, the MCS is my toy,,, I am keeping my Honda Element for utility use, but since that is only getting an average of 21 mpg, I may use the MCS more then I thought 
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From: Seattle, WA
Originally Posted by AndyWSea
I paid $2.999/gal for 93 octane Mobil on Thursday. But I generally run 89 octane and my 03 MCS runs fine on it for commuting purposes. If I think I'm going to run the car hard (like on a run) then I'll switch to 93 octane...
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Joined: Mar 2005
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From: S.E. North Carolina
Originally Posted by jimdaniels
i regularily get 33 mpg using regular in my mc cabrio. don't know how anybody can be content with 25 mpg from a four cylinder.
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Joined: May 2006
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From: Maryland, USA
I'm glad I found this thread. I've been trying to decide between an S and a non-S, and the fuel requirement was one consideration.
Now that I know they both have the same octane requirement (the dealer hadn't mentioned this) it makes my choice a little easier (i.e. S!). :D
Now that I know they both have the same octane requirement (the dealer hadn't mentioned this) it makes my choice a little easier (i.e. S!). :D
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How's this for Premium??
From Union 76 in San Marino, CA, 4 days ago.
From Union 76 in San Marino, CA, 4 days ago.
Originally Posted by Scooper_06
I live in So Cal. Can anyone recommended a premium brand? (chevron, shell, etc?) What about the Costco brand (high octane 91)?